DETROIT -- Oakland County Prosecutor Jessica Cooper and Sheriff Mike Bouchard are listed as defendants in a $100 million lawsuit filed by the mother of one of the Oakland County Child Killer's victims.

"This is David going up against Goliath," said attorney Paul Hughes during a Tuesday morning press conference. Hughes is representing the estate of victim Kristine Mihelich and her mother Debbie Jarvis.

The lawsuit, filed Monday in federal court, also names members of the Michigan State Police. It requests the U.S. Department of Justice take over the investigation and suggests there is a possibility of additional victims.

The lawsuit accuses the local law enforcement of either gross mismanagement or conducting a cover-up.

"Tomorrow would have been Kris' birthday," Jarvis said. "She will always be 11 to me.

"It's time for Jessica Cooper to step aside and let the (U.S.) Department of Justice investigate this case."

Only four other victims were listed in court documents, but a press release stated there is a possibility of at least 11 or more.

The known victims of the Oakland County Child Killer include Mark Stebbins, 12, of Ferndale; Jill Robinson, 12, of Royal Oak; and Timothy King, 11, of Birmingham. The four possible new victims listed in the lawsuit are Donna Serra, who was abducted in 1972 in St. Clair Shores; Kim Larrow, who was taken in June 1981 in Canton; Kimberly King, who went missing in 1979 from Warren; and Jane Allan, who was abducted in 1976 in Royal Oak.

The lawsuit also contends a meeting involving Oakland County Undersheriff Mike McCabe, Oakland County Chief Assistant Prosecutor Paul Walton, former Detroit Police Chief Ike McKinnon, a reporter with The Associated Press and an unknown individual investigating the case for Jarvis took place in 2010 at McKinnon's home. The meeting was held at the request of the unknown individual seeking access to the case for a particular address.

The individual, whose identity is unknown to Jarvis and her attorney, has compelling evidence to uncover the actual killer or killers, according to Hughes.

There is only one piece of evidence the individual needs to tie his findings together and Cooper has refused to give that information, said Hughes, who admitted he has only talked to the individual and believes he has a background in law enforcement.

Hughes wouldn't disclose any details of the individual's theories, but said he has verified enough information himself to have faith in it.

The lawsuit also accuses law enforcement of intimidating Jarvis' family, requesting they all provide DNA samples.

"There is no reason to ask for DNA from Debbie's children, who were just 3, 6, and 8 at the time of Kristine's disappearance."

Attached to the lawsuit was an email sent by the individual in July 2011 to Michigan State Police Detective Sgt. Dave Robertson, stating his findings will be turned over to the FBI because of their refusal to supply him with the address.

Hughes contends that threat resulted in Jessica Cooper requesting a grand jury be convened to investigate the matter.

"It was a smoke screen," he said.

According to Cooper, the case has no basis in fact or law.

"They are rambling," she said of the lawsuit. "The fact they are written by an attorney is amazing to me."

Jarvis is being taken advantage of by a conspiracy theorist, Cooper contends.

"They are exploiting her and they are exploiting the case and that is the sad tragedy of it," she said.

Bouchard called the claims made by Hughes outrageous and frivolous.

"I'm sympathetic to every family and family member that lost a loved one, and I fully understand that if there's an inclination that someone could help bring closure or solve a case, you would grab at that chance," Bouchard said, "but (Hughes) provides nothing but heartache."

Bouchard said the Department of Justice, through the FBI, has already been involved in the case for years.

He said one of the first things he did when he became sheriff in 1999 was to find out what more could be done in the Oakland County Child Killer investigation.

"I just feel immense sympathy and a deep commitment to the families" of the victims, he said.

A press release issued prior to the lawsuit being filed states that donations are being accepted to help support the lawsuit.

No one is trying to profit from this tragedy, said Jarvis' brother, Spencer Bell of Royal Oak.

"Debbie has put her life savings into this," he said. "She just wants answers."